x2 You have your chubs clocked back as far as they will go, but you need to shorten the upper links to rotate the entire axle back. What this does as well as helping clear the servo horn is to improve your breakover steering. I know some guys will notch out the slot on the chubs to clock them back even further (which I may find myself doing).
So, first thing would be to see if you can move the upper link mount on the chassis further back. Start there. If not, then you need to shorten the rod ends or the links altogether. "thumbsup" If that doesn't work, depending on your WB, you could lengthen the lowers too. Same effect, just depends on where your WB is sitting.